The scathing message accuses the ex-husband of ‘betrayal’ and damaging his former partner’s self-worth

The letter, which was published on Scary Mommy, is headed with the title: “A Letter To My Best Friend’s Ex-Husband Because Screw You A**hole.”

Although the author acknowledges that there are many reasons for divorce, she insists: “Other times, someone does something to their partner that can’t be moved past…

“You fall into that latter category.

“This divorce is your fault. You hurt my friend, you lied to my friend, and you betrayed my friend.”

You are the catalyst for the heartbreak, pain, anxiety and overwhelming stress

Anonymous writer of the scathing open letter

While the writer praises her pal for being able to be civil for the sake of their children, she relishes in the fact that she doesn’t have to master the same politeness.

The letter continues: “I get to pull the Best Friend Card here, and I get to just be p***** the f*** off that you are the catalyst for the heartbreak, pain, anxiety and overwhelming stress that you are causing my friend.”

While the unidentified correspondent admits that the man is a “good father”, she goes on to blame him for ruining her best mate’s self-worth and making her stay up all night crying.